Fuel-feed control



Sept. 22, 1825. 1,554,866

P. s. MARTIN FUEL FEED CONTROL Filed Feb. 24., 1921V 2 sheets-sheet 1 72 @7m @ZW C 1%@ CALM-JL IJI sept. 22, 1925.

P. S. MARTIN FUEL FEED CONTROL Filed Feb. 24. 192i 2 Sheets-Sheet 2 Suce/tou H/a Gnozmays.'

Patented Sept. 22, 1925.

UNITED STATES Parri-nvrI OFFICE.

PERRY S. MARTIN, HARRISONBURG, VIRGINIA.

FUEL-FEED CONTROL.

To all 'whom t may concern:

Be it known that I, PERRY S. MARTIN, aA

citizen of the United States, residing at Harrisonburg, in the county of Rockingham and State of Virginia have invented certain new and useful Improvements in Fuel-F eed Controls; and I do hereby declare the following to be a full, clear, and exact descri tion of the same, reference being had tot eaccompanying drawings, forming part .of this specification.

This invention relates to devices for controlling the ow of liquid and has particular application to such devices when used in con-- nection with hydrocarbon burners, as for example, the usual oil cook stoves, hover heating burners, etc.

The object of the present invention is to provide a. fuel feed control of simple design which will effectively govern the supply of liquid fuel to a burner, and which may be readily controlled with a great 'degree of accuracy.

A further object of my invent-ion lies in the provision of a combined cook stove and reservoir withA a lfuel feed control between the reservoir and stove, whereby the supply of fuel may be entirely cut off or may be permitted to flow at such a rate as may be desirable for each of the separate burners of the stove.

It has long been sought to control the supply of fuel to a hydrocarbon burner in such fashion that the burner will operate' efciently under different heating requirements, and inthe past endeavors have been made to secure proper adjustment of the heat by` altering the relative positions of the burner and reservoir, or 'by tilting one or both of these members. This has proven unsatisfactory in practice, but up to the present time there is no hydrocarbon burner of the trough type that can operate with equal efficiency at both full and half charge.

By using the present invention and' in addition the device of my co-pending application Serial No. 422,913, filed November 9, 1920, it is possible to secure maximum eiic iency of the device when operating with less than 50% of the'full supply of fuel; and with the thermostatic control shown in certain of the figures of the drawings herewith, or by the manual control shown in the first two figures the size of the iiame may be controlled without 'any movement of eitherv the burner or the fuel reservoir.

In the drawings,-

Figure 1 is a plan view of a preferred embodiment of my invention as applied to an oil burning stove.

Fig. 2 is a side elevation of the device shown in Fig. 1.

. Fig. 3 is a verticalsection through amodification having p-articular usein connection with a thermostatically controlled heating element.

Fig. 4 is a vertical elevation of the burner of Fig. 3 taken at right angles to Figure 3.

Fig. 5 is a horizontal section on the line 5 5 of Fig. 4.

The stove illustrated is provided 'with solid sheet metal ends 11 extending the full height and width of the -stove and having the usual flanges 12 at the bottom to afford firm support. These two ends are connected together by a bar v14 which supports the burners 15 and by the'y side pieces 16 and the drip vpan 17 these. parts being of usual construction and forming no part of the inventlon. i

The side pieces 16 are braced by means of channel Sections 18 which are notched at one end to receive the` main fuel pipe 19 from which lead the various pipes or conduits 20 supplying the fuel to the individual burners and lying within and being protected by these channels 18. l o

A fuel receptacle 21 is supported from the frame of the stove in `any desired manner as by the bracket 22 and is adapted to support a liquid holding vessel 23, so as to form a constantlevel fount. The pipe 19 is directly connected to the receptacle 21, preferably in the manner shown.

A plurality of pointers 25 are pivoted to the side piece 16 by a friction pivot 26 and cooperate with an indicating plate27 to show the rate of flow of fuel through the conduits 2 which are' operatively connected to the pointers 25 by means of a small angular bracket 28 extending through an arcuate slot 29 in the side piece 16 and embracing the conduit 20a short distance from its downturned end 30 which discharges the fuel drop by drop into the funnel 31 connected by means of the pipe 32 with the burner bowl 33.

The indicators or levers 25 are shown in Figure 2 at mid-position. By raising these levers to the top .of the slot 29, the downturned end of the conduit will be raised slightly above the liquid level in the reservoir 21 so that no fuel will flow. By lowering the lever 25 the rate"of flow will be increased inproportion to the amount of lowering of the end 30. It will thus be seen that the size of the flame in the burners may be regulated to a nicety ,and each independently of the others.

Referring now to Figures 3, 4 and 5, which show a modification of the invention wherein the fuel feed control is madegparticularly eiicient for use with a heat radiating means such for example as that shown in my copending application Serial No. 422,914 of November 9, 1920; from which application the drawings on Sheet 2 were copied. In this, modification the reservoir 35 rests upon the upper reinforced edge 36 of the oil fount, so as to be protected by the casing 37 and has an outlet 38 extending into the oil fount 39 thereby maintainingthe Gilat the level of the bottom of such outlet. The reservoir is provided with the usual cork valve 40.

connected to a rod 41 of greaterlength than l the distance from the cork 'to the base 42 more in a down-turnedwspout 47 directlyv above the oil cup 48, the spout'preferably being centrally located at normal flow with respect to the mica'lwindow 49 closing a corresponding orifice 1n the casing 37. A

small bracket-50 is Secured to the side of the casing 37 and furnishes a pivotal support 51 for the dripregulating lever 52 as well as threaded supports for the adjusting screws 54'and 55 governing respectively the,

minimum and maximum flow ofoil through lthe flexible tube 45.

The supply of oil to the burner is controlled by athermostat 56 of the usual form, preferably of the circular corrugated double convex ether-alcohol type, secured to a bracket 57 clamped by the oil pipe 58 by means of the bolts or other fastenings 60.*/ A thermostat 61 is hinged to the bracket as at 62 and is normally held against the umbo'63 of the thermostat by means of the action Vof a weight 64 swung from the regulating lever 52 on the tube side of the pivot. 51 and operating by adding its weight to that of the tube 45 to swing the lower end of lever 52 Iaway from the thermostat bracket, but owing end of the tube 45 until the short arm of i the lever comes into contact with the minimum adjusting screw 54 when further increase in temperature will be,acco`mmodated merely through the bending of the relatively long levers 52 and 61. The minimum adjusting screw 54 is usually'set to provide just suiiicient flow of oil to operate the lburner andthe maximum adjustingscrew is "normally set so that the greatest quantity of o-il will be furnished ,that can be taken care of by the burner. These regulating screws are not made permanent for obvious reasons including the need for a very rapid flow on first using the device for example;

need not be described in the present appli` cation, except to state that its principal features lie in the provision of slightly raised partitions 70 in the trough of the burner bowl 71, so that the liquid fuel entirely fills the 'front half of the annular trough to the level of the top of the partitions 70 before any of the fuel passes to the farther side so that at a point just short of such spilling over the partitions, the burner is operating at full efficiency in spite of the fact that only half of the normal consumption of' fuel isbeing used. lI-t should be understood, however, that this showing of the burner and other parts of the appa-- ratu's `is purely illustrative and that the scope of the invention is toI` be limited only as called for in the following claims. What is claimed is:

1. In a fuel feed control device, a base having a fuel receiving depression therein, a font supported by said base, a conduit extending in a helical manner around said font, with one end permanently secured to said. font and with the free end located directly above said depression, and means 'for raising and lowering the free end of the tube to alter the. ratev ofdischarge-5f fuel from said font to said depression.

`2. In a device of the character described, a circular base having a fuel receiving depression adjacent the periphery, a cylindrical font centrally disposed on the base,

rounding the font, a

means for maintaining a constant level of fuel in said font, a c Iindrical casing surexible metal tube located in the annular space between thefont and the casing completely surrounding the font and having one end permanently se cured to the font below the constant level of fuel therein, and means extending within the casing to a point above said depression for engaging the free end of said tube to raise and lower it with respect to the stationary end of the tube whereby the rate of dripping of fuel from` the free end of the tube to the fuel receiving depression is controlled.

3.l In combination, a fount, a flexible discharge tube leading therefrom, a casing surrounding said fount vand tube and thermostat controlledmeans carried by said casing foealtering the-flow of liquid through said tu 4. ln combination, a fuel reservoir, a flexible tube discharging liquid therefrom, pivoted means embracing the free end of said tube, means for limiting the movement of said free end, and means for moving said pivoted means.

5. In combination, a constantlevel liquid fuel reservoir, a flexible tube discharging liquid therefrom, pivoted means embracing the free lend of said tube, adjustable means for limiting the movement of said free end, an'd temperature controlled means for moving said pivoted means.

PERRY s. MARTIN. 

